Free shipping on every order

4-4-4 Fertilizer for Plants

Our 4-4-4 Fertilizer for Plants is a liquid all-purpose fertilizer for leafy vegetables, herbs and everyday plants. It provides balanced nutrition to support healthy foliage, strong roots, and steady overall growth.

Size

Buy 2, save 10% · Buy 3+, save 15%

Buy direct for better prices than other marketplaces

Quantity
1

Free shipping1M+ Bottles SoldMade in Seattle

When supplemental feeding may be helpful

  • During the active growing season, when plants are putting on new growth
  • When beds or containers have been growing plants for several seasons without fresh soil
  • After heavy rain or frequent irrigation, which can carry nutrients below the root zone
  • For plants in containers, raised beds or sandy soils that hold few nutrients
  • When many different plants need feeding and one balanced formula is simpler to manage

Plant appearance can also be affected by light, watering, roots, temperature, and other growing conditions, so feeding is one part of overall plant care.

Results you can see

Supports vibrant, leafy growth for healthy, flavorful herbs and greens.

Supports vibrant, leafy growth for healthy, flavorful herbs and greens.

Helps encourage consistent leaf and stem development for thriving plants.

Helps encourage consistent leaf and stem development for thriving plants.

Supports healthy root development for better water and nutrient uptake.

Supports healthy root development for better water and nutrient uptake.

Works for leafy vegetables, herbs and everyday plants

  • Lettuce
  • Spinach
  • Kale
  • Basil
  • Parsley
  • Cilantro
  • Houseplants
  • Annual Flowers

Label facts

NPK 4-4-4 with 1% sulfur, plus iron, manganese and copper.

Derived from kelp (ascophyllum nodosum), monopotassium phosphate, ammonium nitrate, potassium sulfate, iron sulfate, manganese sulfate, zinc sulfate, copper sulfate.

Store cool and dark. Guaranteed 12 months from purchase; keeps up to 2 years.

Frequently asked questions

What does 4-4-4 mean?

The three numbers are the percentages of nitrogen, phosphorus and potassium in the formula, and in 4-4-4 Fertilizer for Plants they sit in equal balance. Nitrogen drives leaf growth, phosphorus supports roots and flowering, and potassium supports resilience. An even ratio doesn’t push a plant in any one direction, which is what leafy vegetables, herbs and everyday plants want: steady, all-round growth rather than a hard shift toward flowers or fruit. That balance is also what makes it suited to frequent feeding.

How often should I feed with it?

4-4-4 Fertilizer for Plants is meant for regular, light feeding rather than occasional heavy doses. Feed every 2–4 weeks in spring and summer while your plants are actively growing, then ease back to every 4–8 weeks in fall and winter as growth slows. Because it’s a liquid, it goes straight into the watering can, so feeding happens as part of a normal watering instead of as a separate task. Leafy greens and herbs you cut from regularly tend to sit at the more frequent end of that range.

Is this strong enough for hungry plants?

For everyday feeding, yes. 4-4-4 Fertilizer for Plants is balanced by design, so it can be used often, and frequent light feeding keeps nutrients steady in the soil rather than arriving in one large dose. That suits leafy vegetables, herbs and most container plants well. Heavy feeders such as tomatoes and squash draw harder once they start setting fruit, and at that stage you can step them up to a higher-analysis blend while 4-4-4 continues to carry the rest of the garden.

Which plants is this ratio for?

4-4-4 Fertilizer for Plants is formulated for plants grown for steady, all-round growth rather than a heavy flowering or fruiting push. Lettuce, spinach, kale, basil, parsley and cilantro are the core of it, and the same balance suits houseplants and annual flowers that want consistent nutrition through the season. Because the ratio is even, one bottle can feed a mixed bed of greens and herbs, a windowsill of pots and a few containers of annuals on the same schedule.

Will this burn my plants?

4-4-4 Fertilizer for Plants is a dilute liquid feed, and dilution is what matters here. Fertilizer burn happens when concentrated salts sit against the roots: too much product in too little water, or granules piled at the base of a plant. Mixed at the recommended dilution and applied every 2–4 weeks in the growing season, the nutrients arrive in solution at a strength the roots take up as they water, spread through the soil rather than concentrated in one spot. Keep to that mix, and if you ever overdo it, water through with plain water.

When will I see results?

Foliage responds first. With 4-4-4 Fertilizer for Plants mixed into regular watering, greener leaves and sturdier new growth usually show within two to four weeks of consistent feeding, because a liquid is available to the roots as soon as it’s watered in. Leafy greens and herbs you harvest often tend to show it soonest, since they’re constantly rebuilding leaf tissue. Flowering and fruiting benefits on annuals and other everyday plants build more gradually over the season, so the clearest picture comes from staying on the schedule rather than judging after a single feed.

Let's Start Growing!

Choose your size
Growing more than one plant? Pick your plants, we match the food. Buy 2, save 10% · Buy 3+, save 15% Build a bundle →
4-4-4 Fertilizer for Plants 8oz $11.99